package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements IOPeration {
    @Override
    public void work(BookList bookList) {
        System.out.println("删除图书!");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入你要删除的图书:");
        String name = scanner.nextLine();

        int pos = -1;
        int currenSize = bookList.getUsedSize();
        int i = 0;
        for(;i<currenSize;i++){
            Book book = bookList.getBook(i);
            if(book.getName().equals(name)){
                pos = i;
                break;
            }
        }
        if(i==currenSize){
            System.out.println("没有你要删除的图书!");
        return;
        }
        //开始删除
        int j = pos;
        for(;j<currenSize-1;j++){
            Book book = bookList.getBook(j+1);
            bookList.setBooks(j,book);

        }
        bookList.setBooks(j,null);
        bookList.setUsedSize(currenSize-1);
    }

}